#include <LiquidCrystal.h>

const unsigned long INTERVAL = 2000;  // sets blink rate
const int  GRN_LED_PIN = 3;
const int  RED_LED_PIN = 2;
const int rs = 12, en = 11, d4 = 10, d5 = 9, d6 = 8, d7 = 7; //Define the pins

bool led1State = true;
bool led2State = false;
unsigned long lastTime = 0;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  lcd.begin(16, 2);
  pinMode( GRN_LED_PIN, OUTPUT);
  pinMode( RED_LED_PIN, OUTPUT);
}

void loop() {
  if (millis() - lastTime >= INTERVAL)  {
    lastTime = millis();
    led1State = !led1State;
    led2State = !led2State;
    lcd.clear();
  }
  if (led1State)  {
    digitalWrite( GRN_LED_PIN, HIGH);
    digitalWrite( RED_LED_PIN, LOW);
    lcd.setCursor(0, 0);
    lcd.print("HIGH");
    lcd.setCursor(12, 0);
    lcd.print("LOW");
  } else {
    digitalWrite( GRN_LED_PIN, LOW);
    digitalWrite( RED_LED_PIN, HIGH);
    lcd.setCursor(0, 0);
    lcd.print("LOW");
    lcd.setCursor(12, 0);
    lcd.print("HIGH");
  }
}

/*
  digitalWrite(6, HIGH); //To turn ON LED
  delay(1000); // No. of seconds the LED has to be ON. It is given in milliseconds. 1000 millisecond = 1 second
  digitalWrite(7, LOW); //To turn OFF LED
  delay(1000); // No. of seconds the LED has to be OFF.
  lcd.clear();

  if (digitalRead(6) == HIGH) {
    lcd.print("HIGH");
  }
  else {
    lcd.print("LOW");
  }

  lcd.setCursor(12, 0);

  if (digitalRead(7) == HIGH) {
    lcd.print("HIGH");
  }
  else {
    lcd.print("LOW");
  }

  digitalWrite(6, LOW); //To turn OFF LED
  delay(1000); // No. of seconds the LED has to be OFF.
  digitalWrite(7, HIGH); //To turn ON LED
  delay(1000);
  lcd.setCursor(0, 0);

  lcd.clear();

  if (digitalRead(6) == HIGH) {
    lcd.print("HIGH");
  }
  else {
    lcd.print("LOW");
  }

  lcd.setCursor(12, 0);

  if (digitalRead(7) == HIGH) {
    lcd.print("HIGH");
  }
  else {
    lcd.print("LOW");
  }

  }
*/